I am in need of a new phone but the ones I like aren't sold by Sprint (my provider). I have read that you can buy any phone and if it's unlocked, it will work with your provider. I don't know how true this is, but if so.... How do I unlock phones, or know if they're unlocked? Will sprint activated the phone, or will I have to do something to get it working (how and what)? Add anything else I need to know. I know nothing about any of this, I just want a new phone and it probably won't be a 'sprint' phone. So how do I pick and get it working?